diff options
| author | Vedant Kumar <vsk@apple.com> | 2017-07-25 19:34:23 +0000 |
|---|---|---|
| committer | Vedant Kumar <vsk@apple.com> | 2017-07-25 19:34:23 +0000 |
| commit | bbc953fed443409b1f342f6f0584047195705302 (patch) | |
| tree | 3fe6e5df07dc23cbc3d726947aebb95bed679909 /lldb/packages/Python/lldbsuite/test/help/TestHelp.py | |
| parent | 657ac14816febccd38c00c192ce18142d518210d (diff) | |
| download | bcm5719-llvm-bbc953fed443409b1f342f6f0584047195705302.tar.gz bcm5719-llvm-bbc953fed443409b1f342f6f0584047195705302.zip | |
[ubsan] Null-check pointers in -fsanitize=vptr (PR33881)
The instrumentation generated by -fsanitize=vptr does not null check a
user pointer before loading from it. This causes crashes in the face of
UB member calls (this=nullptr), i.e it's causing user programs to crash
only after UBSan is turned on.
The fix is to make run-time null checking a prerequisite for enabling
-fsanitize=vptr, and to then teach UBSan to reuse these run-time null
checks to make -fsanitize=vptr safe.
Testing: check-clang, check-ubsan, a stage2 ubsan-enabled build
Differential Revision: https://reviews.llvm.org/D35735
https://bugs.llvm.org/show_bug.cgi?id=33881
llvm-svn: 309007
Diffstat (limited to 'lldb/packages/Python/lldbsuite/test/help/TestHelp.py')
0 files changed, 0 insertions, 0 deletions
